CAJ | 학술논문

　　运用等离子喷涂技术在45钢表面制备了NiCrBSi?Y2O3复合涂层，研究了其微观组织和摩擦学性能。结果表明：等离子喷涂NiCrBSi?Y2O3复合涂层主要由γ-Ni、CrB、Cr7C3和Y2O3等物相组成。在复合涂层中添加适量的Y2O3可增加CrB和Cr7C3等硬质相的含量，并提高复合涂层的致密度。当Y2O3含量(质量分数)为0.5%时， NiCrBSi?Y2O3复合涂层具有优异的摩擦学性能，其摩擦因数为0.175，仅为纯NiCrBSi涂层的37%；其磨损质量为1.2 mg，比纯NiCrBSi涂层的降低了43%。当载荷为6~10 N时，NiCrBSi?Y2O3复合涂层呈轻微磨损，其磨损机理主要为粘着磨损，并伴有轻微的微观切削和微观断裂磨损；当载荷达到12 N时，复合涂层产生严重磨损，其磨损机制转变为粘着磨损和严重的微观切削磨损。
　　운용등리자분도기술재45강표면제비료NiCrBSi?Y2O3복합도층，연구료기미관조직화마찰학성능。결과표명：등리자분도NiCrBSi?Y2O3복합도층주요유γ-Ni、CrB、Cr7C3화Y2O3등물상조성。재복합도층중첨가괄량적Y2O3가증가CrB화Cr7C3등경질상적함량，병제고복합도층적치밀도。당Y2O3함량(질량분수)위0.5%시， NiCrBSi?Y2O3복합도층구유우이적마찰학성능，기마찰인수위0.175，부위순NiCrBSi도층적37%；기마손질량위1.2 mg，비순NiCrBSi도층적강저료43%。당재하위6~10 N시，NiCrBSi?Y2O3복합도층정경미마손，기마손궤리주요위점착마손，병반유경미적미관절삭화미관단렬마손；당재하체도12 N시，복합도층산생엄중마손，기마손궤제전변위점착마손화엄중적미관절삭마손。
The NiCrBSi?Y2O3 composite coatings were prepared on the surface of 45 carbon steel by plasma spray, the microstructure and tribological properties of the coatings were investigated. The results show that the NiCrBSi?Y2O3 composite coatings are mainly composed of γ-Ni, CrB, Cr7C3 and Y2O3. With addition of Y2O3, hard phases such as CrB, Cr7C3 emerge in composite coating, and the density of the composite coatings also increases. The NiCrBSi?0.5Y2O3 composite coating presents excellent tribological properties. Its friction coefficient is 0.175, which is about 37%of that of the pure NiCrBSi coating. The mass wear loss is 1.2 mg, which is reduced by 43% compared with the pure NiCrBSi coating. When the loads are 6?10 N, the NiCrBSi?0.5Y2O3 composite coating suffers from slight wear and the wear mechanisms are mainly adhesive wear accompany with slight micro-cutting wear and micro-fracture wear. As the load increases to 12 N, the wear mechanisms are adhesive wear and severe micro-cutting wear.